What are the functional units of 8085 microprocessor?
8085 Microprocessor – Functional Units
- Accumulator. It is an 8-bit register used to perform arithmetic, logical, I/O & LOAD/STORE operations.
- Arithmetic and logic unit.
- General purpose register.
- Program counter.
- Stack pointer.
- Temporary register.
- Flag register.
- Instruction register and decoder.
What is a microprocessor explain the function of building blocks of a 8085 microprocessor?
The microprocessor (also known as Central Processing Unit(CPU) ) is a computational machine. It executes arithmetic, logical, control and input/output operations. It is programmable and follows the instructions programmed into its memory.
What are the functional blocks of a microprocessor?
A microprocessor consists of an ALU, control unit and register array. Where ALU performs arithmetic and logical operations on the data received from an input device or memory. Control unit controls the instructions and flow of data within the computer.
What are the various registers of 8085 microprocessor?
The 8085 has six general-purpose registers to store 8-bit data; these are identified as- B, C, D, E, H, and L. These can be combined as register pairs – BC, DE, and HL, to perform some 16-bit operation. These registers are used to store or copy temporary data, by using instructions, during the execution of the program.
Why it is called 8085 microprocessor?
The word length of a processor depends on data bus, thats why Intel 8085 is called 8 bit Microprocessor because it have an 8 bit data bus. Control Bus: Microprocessor uses control bus to process data that is what to do with the selected memory location. Some control signals are Read, Write and Opcode fetch etc.
What are the functions of general purpose register?
General Purpose registers are used for temporary storage of data and memory access. Since the processor accesses register more quickly than memory. 8086 has four 16-bit general-purpose registers AX, BX, CX and DX. These are available to the programmer, for storing values during programs.
What is the function of memory address register?
In a computer, the memory address register (MAR) is the CPU register that either stores the memory address from which data will be fetched to the CPU, or the address to which data will be sent and stored.
What is difference between register and memory?
Registers hold the operands or instruction that CPU is currently processing. Memory holds the instructions and the data that the currently executing program in CPU requires.